Hi,
I think there is a misunderstanding about what Clock.advanceAll()
does in the presence of nested clocked finishes. Namely, it advances all
clocks of the activity (both inner and outer). This points to perhaps a
mistake made in the specification when we replaced the next keyword with
Clock.advanceAll() (I will take a look). In the case of nested clocks, we
should have used Clock.advance().
To illustrate, I added print statements to the more complex program,
run on Native X10, and I see output that is consistent with this
interpretation of Clock.advanceAll:
[dgrove@linchen myTests]$ x10c++ Test1.x10
[dgrove@linchen myTests]$ ./a.out
Outer, tick 0 x=-1
Inner 2, tick 0 x=-1
Inner 1, tick 0 x=-1
Outer, tick 1 x=-1
Outer, tick 1 after assign x=3
Inner 2, tick 1 x=3
Inner 1, tick 1 x=3
Inner 1, tick 2 x=3
Inner 1, tick 2 after assign x=1
Inner 2, tick 2 x=3
Inner 2, tick 3 x=1
Inner 2, tick 3 after assign x=0
x=0
The programs is appended.
--dave
class Test1 {
public static def main(Rail[String]) {
var x: Long = -1;
clocked finish {
clocked async {
clocked finish {
Console.OUT.println("Inner 1, tick 0 x="+x);
Clock.advanceAll();
Console.OUT.println("Inner 1, tick 1 x="+x);
Clock.advanceAll();
Console.OUT.println("Inner 1, tick 2 x="+x);
x= 1;
Console.OUT.println("Inner 1, tick 2 after assign x="+x);
}
}
clocked async {
clocked finish {
Console.OUT.println("Inner 2, tick 0 x="+x);
Clock.advanceAll();
Console.OUT.println("Inner 2, tick 1 x="+x);
Clock.advanceAll();
Console.OUT.println("Inner 2, tick 2 x="+x);
Clock.advanceAll();
Console.OUT.println("Inner 2, tick 3 x="+x);
x= 0;
Console.OUT.println("Inner 2, tick 3 after assign x="+x);
}
}
Console.OUT.println("Outer, tick 0 x="+x);
Clock.advanceAll();
Console.OUT.println("Outer, tick 1 x="+x);
x = 3;
Console.OUT.println("Outer, tick 1 after assign x="+x);
}
Console.OUT.println("x="+x);
}
}------------------------------------------------------------------------------
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